Hi,
I had 3 red furies pencil modded to 3 Ghash each
I'm cooling them with an artic breeze usb fan and it seems all right as compared to touching the heat sink when without cooling.
However the ASIC chip is too hot to touch.
Not sure whether this is burn or shortened the life span of the miners.
Please advise, thanks.
With Beastlymac's comments in mind, and notwithstanding his advice - if you're concerned about the heat and want to keep them efficiently cooled, I'd recommend replacing the heatsink fans altogether some any spare CPU HSF's that you can scavenge. You might some in old PC cases or tucked in drawers, or someone you know might, and they're very well engineered to delivery VERY quiet and VERY efficient cooling. I posted about the first one I converted earlier this year:
https://bitcointalk.org/index.php?topic=319419.msg3635707#msg3635707